Subsites homepage is set to "draft" even though it's not been edited

So I have a customer that got multiple offices that each got its own website, so I figured using the subsite module was a clever idea, instead of setting up an individual SS installation for each office.

It's now in production and it's working very well with the sharing of assets and stuff. The only thing is that each week the homepage for many subsites get set into draft mode, and therefor when I go to the subsite url, it says it can't find the page it's looking for. When I save the homepage, it finds it. The admins for each subsites say they haven't been editing.

I don't exactly know what's happening. If it's one of the system admins that's in an editing the main site, and therefor each of the subsites homepage goes into draft mode.

Anyone experienced this before? I'm getting tired of logging in and saving each individual subsite 'home'.

I guess it's worth mentioning that each subsite was created as a copy of another office, since the structure is pretty much the same for each office. Is it a relation in the DB that's affecting this?